IMG_0354 1969 Ludwig Downbeat Mod Orange Original Set

ORIGINAL DOWNBEAT MOD ORANGE LUDWIG DRUMS. NEED A LITTLE HELP TO FIND OUT VALUE!!

So my boyfriend has had these drums for 31yrs. Barely played them for the last 25yrs. They are a complete original Downbeat Mod Orange set all original besides snare but it is still vintage. Drums in good to excellent condition. When I took this picture I was actually cleaning spare room and wanted to see what they look like set up. Yes they have the bottom heads and rims for drums, in fact he has everything down to the drumsticks. Like I said he has had these since he was 14 and has basically kept them stored in spare room covered up by a sheet. It recently came to our attention that these drums are worth some money and we thought we would check into it and see just what we could get out of them seeing how for one they are a complete set original from factory other then when he bought them they had heads replaced and two the more we look the more we realize they are quite rare. This is not a kit or a wrap these are the original 1969 Downbeat Mod Orange Ludwig!!

So what we were wondering was does anyone know who we could contact to find out the value of these drums. Not trying to be rude but since I started this a few days ago no one seems to help just have people who of coarse want them but want them for little to nothing. Not sure if I'm not doing something right seeings how I know nothing about drums other then I know they are old and a well sought out item but no clue of the value.

If someone could please just point me in the right direction. I would really appreciate it!!